
ul li:first-child{
    color: red;
}
ul li:last-child{
    color:green;
}

 .user{
    text-align: left;
    border-bottom: solid 1px #ccc;
    padding: 10px 10px;
    cursor: pointer;
    font-size: 18px;
}
.user:hover{
    background-color: RGB(255, 250, 0);
}
.user .avatar{
    vertical-align: middle;
}
.user .nickname .username{
    margin-left: 20px;
    vertical-align: middle;
    color: rgba(0,0,0,.7);
}
.user .unread{
    vertical-align: middle;
    margin-right: 5px;
    color: red;
}